Product Introduction Phenolic cotton fabric rods, also known as phenolic cotton rods, are high-performance electrica...
Phenolic cotton fabric rods, also known as phenolic cotton rods, are high-performance electrical insulating materials made by impregnating cotton fabric with phenolic resin and curing under heat and pressure. With excellent electrical insulation, mechanical strength, and heat resistance, these rods are widely used in transformers, switchgear, motors, and other electrical equipment.
| Property | Typical Value | Description |
|---|---|---|
| Dielectric Strength | 20–30 kV/mm (surface) | High voltage insulation capability |
| Volume Resistivity | ≥10¹³ Ω·cm | Prevents current leakage through the material |
| Surface Resistivity | ≥10¹² Ω | Reduces surface leakage currents |
| Relative Permittivity (εr) | 4–6 | Ensures stable insulation under AC conditions |
| Loss Tangent (tanδ) | ≤0.02 | Minimizes energy loss in insulation |
| Operating Temperature | 120–150°C | Suitable for long-term transformer and motor operation |
| Short-term Heat Resistance | 180–200°C | Withstands occasional overloads |
| Water Absorption | ≤1% | Maintains electrical performance in humid environments |
Key Advantages:
High Insulation Strength: Suitable for medium- and high-voltage applications.
Excellent Heat Resistance: Performs reliably under high-temperature conditions.
Strong Mechanical Properties: Can support mechanical loads and vibrations.
Easy to Process: Can be machined into rods, custom shapes, and drilled components.
Usage: High-voltage winding supports, end insulation rods, spacer columns
Benefits: Even stress distribution, excellent insulation in oil-immersed environments, and long-term durability
Usage: Winding supports, end insulation, and interlayer spacers
Benefits: Maintains stable electrical properties under high-temperature conditions
Usage: Busbar supports, insulating panels, and switch operation mechanisms
Benefits: Prevents leakage currents and short circuits, ensuring safety and reliability
Usage: Stator and rotor support insulators
Benefits: High mechanical strength and vibration resistance
Usage: Rectifiers, relays, and circuit breakers requiring both mechanical support and electrical insulation
Voltage Rating: Choose based on the working voltage of your equipment.
Temperature Resistance: Select rods rated for long-term operating temperature, typically up to 150°C.
Mechanical Strength: Consider rods for compression, bending, or tension requirements.
Environmental Conditions: For oil, moisture, or chemical exposure, choose rods with high oil and corrosion resistance.
Custom Sizes: Available in standard rods, drilled rods, or custom shapes for easy installation.
Phenolic cotton fabric rods are essential insulating components in modern electrical equipment. Their combination of high insulation, heat resistance, and mechanical strength makes them ideal for transformers, switchgear, motors, and power generation equipment. Choosing the right rod ensures long-term reliability, safety, and optimal performance of your electrical system.
If you are interested in our products,, please send us a message and we will contact you as soon as we receive it. Email: info@ztaero.com whatsApp: +8616650273778
Time:10-20 2025
© Copyright 2019. All Rights Reserved. Designed by ZTAERO.COM Sitemap
